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Finding the Fourth Proportional to 578,781.92, 798,724.56 and 320,664.32

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Solution

The fourth proportional to 578,781.92, 798,724.56 and 320,664.32 is: 442,519.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,781.92 : 798,724.56 = 320,664.32 : x
  2. Step 2: Convert to fraction form
    578,781.92/798,724.56 = 320,664.32/x
  3. Step 3: Cross multiply
    578,781.92x = 798,724.56 × 320,664.32
  4. Step 4: Simplify right side
    578,781.92x = 256,122,467,899.70
  5. Step 5: Solve for x
    x = 256,122,467,899.70/578,781.92
  6. Step 6: Final answer
    x = 442,519.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.